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-rw-r--r--src/i_common.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/i_common.h b/src/i_common.h
new file mode 100644
index 0000000..66dc56a
--- /dev/null
+++ b/src/i_common.h
@@ -0,0 +1,2 @@
+#define i_swap(A,B) double temp = A; A = B; B = temp;
+